These are compact Conductivity portable meters with faster micro processor. These handy and ergonomically designed portable meters are ideal for anyone working on a low budget and still requires fast and reliable measurements. These portable meters are suitable for a wide range of applications, such as Educational, Agriculture and Horticulture, as well as water and environmental analysis. These portable meters with Automatic Temperature Compensation have a smaller, ergonomic and lighter case design. Other features include 100 percent larger and easier to read LED Display and long battery life. Each meter is supplied complete with Conductivity probe with 1 meter cable and calibration solution. MW301 is supplied complete with MA821D/1 EC probe, 20ml 1413 microSiemens/cm sachet of calibration solution, screw driver for calibration, 9V battery and instructions. Range: 0 to 1990 microSiemens/cm. Resolution: 10 microSiemens/cm. Accuracy at 25 degree C: +/- 2 percent Full Scale. Temperature Compensation: automatic, from 5 to 50 degree C. Environment: 0 to 50 degree C, max RH 95 percent. Battery Type: 1 x 9V alkaline (included). Battery Life: approximate 300 hours of use. Measures 145mm length by 80mm width by 40mm height.